| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Outline of Final Research Achievements |
The light-triggered assembling of gold nanorods (AuNRs) modified with photochromic compounds and the fabrication of chiral AuNR assemblies using proteins were investigated. We synthesized a thiolated spiropyran and azobenzenes, and then introduced onto the AuNRs surface as photoresponsive moieties. The AuNRs used were prepared by a seed-mediated growth method. The AuNRs linked by azobenzene dithiols were assembled without photoirradiation, whereas those modified spiropyran with a dithiolane were formed networked assemblies under UV irradiation. These mean that the assembly of AuNRs is constructed by the photoisomerization of spiropyran moieties. Also, we successfully fabricated the chiral assemblies of AuNRs utilizing electrostatic interaction with proteins. The chiral assemblies have record level of chiroptical activity, indicating the strongly plasmonic circular dichroism. Thus the assemblies of AuNRs can be controlled by photoisomerizable ligands and interaction with proteins.
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